// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_BUILTINS_BUILTINS_ASYNC_GEN_H_
#define V8_BUILTINS_BUILTINS_ASYNC_GEN_H_

#include "src/builtins/builtins-promise-gen.h"

namespace v8 {
namespace internal {

    class AsyncBuiltinsAssembler : public PromiseBuiltinsAssembler {
    public:
        explicit AsyncBuiltinsAssembler(compiler::CodeAssemblerState* state)
            : PromiseBuiltinsAssembler(state)
        {
        }

    protected:
        // Perform steps to resume generator after `value` is resolved.
        // `on_reject_context_index` is an index into the Native Context, which should
        // point to a SharedFunctioninfo instance used to create the closure. The
        // value following the reject index should be a similar value for the resolve
        // closure. Returns the Promise-wrapped `value`.
        Node* Await(Node* context, Node* generator, Node* value, Node* outer_promise,
            Node* on_resolve_context_index, Node* on_reject_context_index,
            Node* is_predicted_as_caught);
        Node* Await(Node* context, Node* generator, Node* value, Node* outer_promise,
            int on_resolve_context_index, int on_reject_context_index,
            Node* is_predicted_as_caught)
        {
            return Await(context, generator, value, outer_promise,
                IntPtrConstant(on_resolve_context_index),
                IntPtrConstant(on_reject_context_index),
                is_predicted_as_caught);
        }
        Node* Await(Node* context, Node* generator, Node* value, Node* outer_promise,
            int on_resolve_context_index, int on_reject_context_index,
            bool is_predicted_as_caught)
        {
            return Await(context, generator, value, outer_promise,
                on_resolve_context_index, on_reject_context_index,
                BooleanConstant(is_predicted_as_caught));
        }

        // Return a new built-in function object as defined in
        // Async Iterator Value Unwrap Functions
        Node* CreateUnwrapClosure(Node* const native_context, Node* const done);

    private:
        void InitializeNativeClosure(Node* context, Node* native_context,
            Node* function, Node* context_index);
        Node* AllocateAsyncIteratorValueUnwrapContext(Node* native_context,
            Node* done);

        Node* AwaitOld(Node* context, Node* generator, Node* value,
            Node* outer_promise, Node* on_resolve_context_index,
            Node* on_reject_context_index, Node* is_predicted_as_caught);
        Node* AwaitOptimized(Node* context, Node* generator, Node* value,
            Node* outer_promise, Node* on_resolve_context_index,
            Node* on_reject_context_index,
            Node* is_predicted_as_caught);
    };

} // namespace internal
} // namespace v8

#endif // V8_BUILTINS_BUILTINS_ASYNC_GEN_H_
